Type-writing machine.



PATENTED MAY 28, 1907.

H. L. WAGNER. TYPE WRITING MACHINE. APPLICATION FILED SEPT. 28, 1906.

Eva/17a 5y 14/23 flf/ornay nni PATENT ()FFIOE.

HERMAN L. WAGNER, OF MOUNT VERNON, NEW YORK, ASSIGNOR TO UN DERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A GOR- PORATION OF NEW JERSEY.

TYPE WRETING MACHINE.

Specification of Letters Patent.

Patented May 28, 1907.

:To all whom it may concern:

Be it known that I, HERMAN L. WAGNER, a citizen of the United States, residing in Mount Vernon, in the county of Westchester and State of New Y ork, have invented certain new and useful Improvements in Type- VVriting Machines, of which the following is a s Jeciiication.

f "lhis invention relates to the mechanism in typewriting machines, whereby the rolls which usually press the paper against the platen. are released from the platen.

One object of the invention is to provide, sim le, inexpensive and reliable means for enabling a release key to throw off the rolls, especially when two roller shafts are employed at different points around the platen. 4 Another object is to provide improved means for holding the release key down, so as to leave both hands of the operator free to manipulate the paper.

Iillustrate my improvements as applied to an Underwood front strike writing machine in which two roller shafts extend'along the platen, and in which a fixed rodalso extends along the platen between said roller shafts; spring pressed arms extending from said red to carry said shafts. Upon the rear roller shaft i it: a lever, to which the release hey is directly connected by means of a link and means co operate with said lever both to oscillate said rear shaft away from the platen, and also to swing the forward shaft away from the platen. Upon the release key I also pivot a latch which automatically detains the key in its depressed position; the latch having an arm extending beneath the key and movable upwardly to release the latch; whereby a downward ressure will depress and lock the key w ile an upward movement will cause the same to be restored to normal position. a

In the accompanying drawings, Figure 1 is a sideelevationof an Underwood typewriter carriage having my-improvements applied thereto, the parts all in normal positions. Fig. is a sectional elevation taken at'th-e same end of the platen frame, and

- showing the parts in normal positions. Fig.

3 is a diagram to illustrate the operation whereby depression of the key'oshillates tl'ie rear roll away from the. nlatenf jFig. 415 a;

sectional elevation taken at the left hand end of the platen frame, that is the end opposite from Fig. 2 the parts shown in normal positions. Fig. 5 is a View similar to Fig. 4, but

showing the rolls released from the platen.

Fig. 6 is a sectional rear elevation of the release key latching devices. Fig. 7 is a. sectional elevation similar to Fig. 2, but showing the pressure rolls released from the platen, and the release key locked down. Fig. 8 is a bottom view of the pressure roll system. ing particularly the arms which carry the pressure roll shafts. In said machine impressions are made 'by type. bars 1 againstthe front side of a platen 2, which is journaled by an axle 3 in the platen frame comprising ends 4, 5, and an in clined rear plate or paper shelf 6 which curves forwardly under the platen at 7.

v The forward pressure rolls 8 and rear pressure rolls 9 are mounted respectively upon shafts 1.0, 11, which extend along the platen and are supported respectively by arms 12, 13, extending forwardly and rearwardly from a rod 14 upon which they are hinged. The rod '14 extends along the platen between the shafts 10, 11', and is fixed at its ends upon the ends 4, 5 of the platen; and'the arms are provided with sockets 15 to receive the shafts. Springs 16 pressthe-forward arms, and spring 17 press the arms 13 toward the platen, all 01 said springsbeing secured'upon said rod 14. A release key 18 is formed u on an arm 19 extending forwardly from a iiub 2,0 which turns upon a shoulder screw 21 threaded into the platen frame 5; an arm 22 projecting rearwardly from said hub, and a hnk23 extending downfrom the arm 22 to the front end of a lever 24 to lift the same. Said lever 24 is rigidly secured by means of a hub 25 and screw 26 u on the rear pressure roll shaft 11. When t e key 18 is depressed-andthe link 23 lifted the lever 24 rocks upon a pin 27- rojecting therefrom between its ends and fu cruming against 8. art 28 of the platen frame; whereby the-s aft 11 is giveri an oscillating movement away from' the platen to release the rolls 9, thereon.

It will be seen' thatspurs29, 30 are fixed .by means .o'fhubs 31, 32 upon the shaft-11,

Fig. 9 is a sectional elevation showand that said spurs are adapted to bear upon the forward ends of levers 33, 34, which proj ect forwardlyfrom the shaft 10, being fixed thereon by means of screws 35, 36. .These levers 33, 34 are fulcrumed between their ends upon the fixed rod 14 so that the pressure of the spurs 29, 30 upon the free forward I ends of said levers 33, 34 may rock the latter about said rod 14 to swing the roller shaft 10 away from the platen, Figs. 5 and 7.

During the operation of the lever 24, the spur 30, which turns practically about an axis coincident with 27,'forces the lever 34 to rock about the rod 14 to swing the roller shaft away from the platen. .In other words, while the shaft 11 is moving away from the platen, the tip of the spur moves toward the platen to actuate the lever 34'.

During the initial part of the movement of the shaft 11, the spur 29 bears up against the lever 33, but preferably the latter does not at first yield owing to the pressure of the spring -the roller shaft.

16 against the left hand arm 12 which carries The arm 33 therefore may serve temporarily as an abutment or bearing to support the spur 29, while this end of the shaft 11 oscillates away from the platen, owing to the torsion put upon the shaft by the lever 24. Before the completion of the lever stroke however, the left hand end of the shaft 11 engages a fixed bearing 37, which may be in the form of a bent arm projecting rearwardly from the rod 14. Said-device 37 1 18 books over an abutment 40 prevents this end of the shaft 1 1 from moving farther away from the platen, so that the final movement of said s the spur 29 to force, the lever 33 to rock upon the rod 14' and lift this end of the roller shaft the release of the rolls 8.

I Upon the releasing arm 22 is pivoted at 38 a latch 39 which at the depression of the key rovided upon the platen frame, thereby to old the ressure rolls ,8, 9' away from the platen. Elpon said latch is formed a'rele'asing arm 41 having a finger-piece 42 just beneath the finger piece 18.

v aft at this end is a movement of rotation only, thereby causing Having thus described my. invention, I

claim Y 1. In av typewriting machine having a platen and a platen frame, the combination of a shaft extending along. the platen and having a roll thereon, means for pressing the .roll against the platen, a lever fixed upon said shaft and connected to a finger key, said lever being fulcrumed upon the platen frame, spurs fixed upon said shaft, a second springpressed roller-shaft, and levers extending from said second shaft to said spurs upon the first shaft to be aotuated thereby, to move the second shaft away from the platen, a sup ort being provided for the end of the first s iaft remote from said fulcrum arm, to enable said end of the first shaft to oscillate to move the corresponding end of the second shaft away from the platen.

2. In a typewriting machine having a platen, a roll, and means to press the roll against the platen, the combination with a key for releasing said roll, of a latch called into action by the depression of said key for locking the roll away from the platen, said. latch havinga releasing device in proximity to said key and operable independently thereof.

3. In a typewriting machine having a platen, a roll and means to press the roll against the platen, the combination with a depressible key for releasing said roll, of a latch called into action by the depressiono'f said key for locking the roll away from the platen, said latch having a releasing arm immediately beneath said key, said arm mov' able u ward to release the latch.

4. n a typewriting machine having a platen, a roll and means to press the roll against the platen, the combination of a lever provided with a finger-piece andconnected to said roll to release the same, a latch pivot-- ed upon said lever, and a finger-piece for'releasin' said latch.

-5. n a typewriting machine having a platen, a roll and means to press the roll against the platen, the combination of a lever provided with a finger-piece and connected to said roll to release the same, a latch pivot ed upon said lever, and a latch-releasing finger-piece ri id with said latch, said fingerpiece exten ing beneath said release key and constituting a weight to operate the latch at the depression of the finger i HERMAN L. WAGNER.

Witnesses:

B. C. STICKNEY, K. FRANKFORT. 

